/*
 * Copyright (c) 2012-2017 Red Hat, Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   Red Hat, Inc. - initial API and implementation
 */
package org.eclipse.che.api.agent.server.launcher;

import org.eclipse.che.api.agent.shared.model.Agent;
import org.eclipse.che.api.machine.server.exception.MachineException;
import org.eclipse.che.api.machine.server.spi.Instance;
import org.eclipse.che.api.machine.server.spi.InstanceProcess;

/**
 * Indicates if agent finished working.
 *
 * @author Anatoliy Bazko
 */
@FunctionalInterface
public interface AgentLaunchingChecker {

  /**
   * Indicates if agent finished working.
   *
   * @param agent the agent is being launched
   * @param process the process is generated by launching the target agent
   * @param machine the machine instance
   * @throws MachineException if unexpected error is occurred
   */
  boolean isLaunched(Agent agent, InstanceProcess process, Instance machine)
      throws MachineException;

  AgentLaunchingChecker DEFAULT = (agent, process, machine) -> !process.isAlive();
}
